Coke-oven gas-burner nozzle



W. H. WRIGHT- 3 5% W attorney;

March 4, 192- 2 coma OVEN GAS BURNER NOZZLE Filed Dec. 20, 1919 PatentedMar. 4, I924.

QWETEE STATiFld hdtSfiZi @ATENT EVILLIAM H. WRIGHT, OF CHICAGO,ILLINOIS, ASSIGNOR TO LOUIS WILPUTTE, OF NEW ROCHELLE, NEW YORK.

COKE-OVEN GAS-BURNER NOZZLE.

Application filed December 20, 1919.

To all whom it may concern:

Be it known that I, VVILLIAM H. lVniGHr, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Coke-OvenGas-Burner Nozzles, of which the following is a specification.

The object of my invention is to provide an improved form of gas burnernozzle suitable for use as a burner nozzle in a vertical flued retortcoke oven and of a novel shape which't'acilitates its production with agas measuring orifice of the proper size and facilitates the removal ofcarbon deposits which at times clog the nozzle and reduces the liabilityof nozzle breakage in the cleaning operation.

The various features of novelty which' characterize my invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of my invention,however, and the advantages possessed by it, reference should be had tothe accompanying drawings and descriptive matter in which I haveillustrated and described the best form of my invention now known to me.

Of the drawings:

Fig. l is a partial sectional elevation of a coke oven.

Fig. 2 is a partial section taken at right angles to Fig. l; and

Fig. 3 is a section taken similarly to F 2, but on a larger scale andshowing a portion only of the apparatus shown in Fig. 2.

In the drawings I have illustrated the use of my improved nozzlearrangement in a retort coke oven in which the horizontally elongatedcoking chambers A are separated by heating walls provided with verticalheating flues B connected at their upper ends by a horizontal passage C.Air inlet passages E lead to the lower ends 01" the different flues Bfrom regenerator chambers F beneath the coking chamber A, and gas supplychannels G lead into the lower ends of the fines B from the gas supplyconduits I. Each gas channel I supplies gas to a plurality of flues B.In ordinary practice the fiues B in each heating wall at one side of thecentral fiow reversal plane in the well-known type of Serial No.346,354.

coke oven illustrated receive their gas from i the same channel I whichis supplied with gas through a gas gun inserted into the open outer endof the channel. The distribution of gas from each gas supply conduit Iamong the various flues B supplied by it, is regulated by means ofremovable gas burner nozzles I-I seated one in. the lower end of eachchannel. G. The gas nozzles H may be cleaned and renewed from time totime as the conditions of operation make necessary by means of rodspassed down into the tines B and passages I) from the top of the oventhrough passages B formed in the upper portion of the oven structure inalignment with the flue passages B and normaliy closed at their upperends by the covers B Each gas nozzle H which is ordinarily niadc oi fireclay, is termed with an axial gas passage comprising a short restrictedportion H at its upper end and a lower body portion H of substantiallylarger diameter. The walls of the passage portions H and II? areconnected by the abrupt shoulder portion H The special shape of the gaspassages through the nozzles H possesses important practical advantages.The primary function of the gas nozzles is to serve as gas measuringdevices In order to: obtain a desirable heat regulation, the fuel gasmust be properly distributed to the different combustion flues B. Thisrequires a graduation in the sizes of the orifices in the differentnozzles H for each heating wall. So important is this, that in presentactual practice, the diameters of the gas nozzle passages are measuredin hundredths of an inch. With the new nozzle the measuring orifice isnot the entire gas passage through the nozzle but only the restrictedportion H, and it is, of course, easier to obtain nozzle orifices of theproper size than 'is the case when the nozzle passage is cylindricalthroughout or is slightly conical as has heretofore been the practice.In some cases it is necessary to ream out the nozzle orifices to get theproper size and the reaming operation is obviously simplified with thenew nozzle construction.

The new nozzle construction is of especial value on account of the easewith which it may be cleaned when carbon deposits make this necessary.

In the operation of an oven of the type illustrated there is a tendencyfor the gas passages, and particularly the passages in the gas nozzles H.to become clogged by carbon formed by decomposition or cracking or thehydrocarbon fuel gases supplied to the channels I, and depositing indense compact masses on the walls of the gas passages. The extent towhich carbon thus .tends to deposit in, and clog the gas passagesdepends upon operating conditions. While under some conditions thetendency is not very great it is always necessary to guard against thepossibility of serious trouble from this cause. The portion of thepassages which are most apt to clog are the bores of the gas nozzles Hand these are the passages which it is most important to keep clean.

When the channel through a nozzle H becomes obstructed an iron rod ispassed down through the corresponding passage '3 and line B and anattempt is made to poke out the obstruction. If this is unsuccessful orthe nozzle H is broken as is frequently the case, with the nozzlesheretofore used, the nozzle is removed and a new one put in place by animplement or implements inserted through the passages B and ilue B.

With the special nozzle construction illustrated the tendency is forclogging afiecting gas distribution to be confined to the v 9 i I Irestricted orifice portion H OI each nozzle bore, both because it is themost restricted portion of the bore and because it is at the upper andhottest end of the nozzle. With the clogging carbon concentrated in theportion H of the bore of a nozzle, it is substantially easier to pokeout the carbon or a considerable portion thereof than would be the caseif the nozzle bore were of the same general cross section along itslength, both because of the shorter length of the bore to be thuscleaned and because the carbon poked out of the orifice portion H canfall freely through the much larger portion Htof the nozzle bore intothe channel I from which the carbon may readily be removed usually byburning it out; air for this purpose being admitted to the channels Ifrom time to time in accordance with well-known practice.

The greater ease with which the new nozzle may be cleaned is not onlydirectly advantageous but also tends to reduce nozzle breakage.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

l. A coke oven burner nozzle made of fire clay formed with a gas passagecomprising a short upper measuring orifice portion and a body portion ofsubstantially greater cross-sectional area than said orifice portion. 7

2. In a coke oven having vertical heating fines, gas channels connectedto the lower ends of the fines, and passages in the oven rootregistering with said fines, the improvement which consists in fireclaiy burner nozzles seated in said gas passages and adapted to beinserted, replaced and cleaned through said roof passages, and formedeach with a gas passage comprising a short upper measuring orificeportion and a remaining portion substantially larger in cross sectionthan said orifice portion.

Signed at Chicago, in the county o1 Cook and State of Illinois, this16th day of De-- cember, A. D. 1919.

WILLIAM H. WRIGHT.

